Re: Fwd: Re: pf: BAD state happens often with portsnap fetch update

Colin Percival wrote:
Chuck Swiger wrote:
FYI, if you pass a:

Connection: keep-alive

...header in the request, Squid will not close the client->proxy
connection and you ought to be able to re-use it to make additional
requests.

In HTTP/1.1, connections are assumed to be persistent unless declared otherwise.

Yeah.

PS: Squid "supports HTTP/1.0 persistent connections", from which the HTTP/1.1
style keepalives derive-- and quick testing suggests these persistent
connections work with either HTTP/1.0 or 1.1 specified in the request.

Grr. I hate adding workarounds to improve compatibility with hopelessly
antique code (seriously, why doesn't squid support http/1.1 yet?),

See src/HttpMsg.c and/or grep for proxy_keepalive:

/* returns true if connection should be "persistent"
* after processing this message */
int
httpMsgIsPersistent(http_version_t http_ver, const HttpHeader * hdr)
{
#if WHEN_SQUID_IS_HTTP1_1
if ((http_ver.major >= 1) && (http_ver.minor >= 1)) {
/*
* for modern versions of HTTP: persistent unless there is
* a "Connection: close" header.
*/
return !httpHeaderHasConnDir(hdr, "close");
} else {
#else
[ ... ]

but I guess I'll make phttpget emit a completely bogus "Connection: Keep-Alive"
header to go along with its HTTP/1.1 requests.

There are lots of proxies and firewalls which restrict connections to HTTP/1.0 behavior besides Squid. It's not that horrible to have to request persistent connections explicitly if it solves the problem...and I hope it does.

--
-Chuck

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